feat(models): cross-plane promotion decision + RunReceipt (fail-closed, replayable) - #274
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…d, replayable) decide_promotion() is the one promotion contract both planes call: a challenger promotes only if it beats the champion AND passes the eval gate; regulated targets need examiner sign-off; nothing self-promotes (eval_passed/signed_off default False). Emits a RunReceipt whose hash is deterministic over the decision inputs — a promotion is examiner-replayable. 8 tests + a tools-tests CI workflow (gates promotion + surface-feed tests, previously ungated).
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The governance capstone — closes the champion/challenger loop with a deterministic, examiner-replayable promotion.
tools/promote_model.py—decide_promotion(), the one promotion contract both planes (cloud lattice + local agent-machine) call. A challenger promotes only if it beats the champion and passes the eval gate; a regulated target additionally needs examiner sign-off; nothing self-promotes (eval_passed/signed_offdefault False). Verdict ∈ promote|hold|shadow|blocked, plus a PSI-drift flag.RunReceiptwhose hash is deterministic over the decision inputs — re-run the inputs, get the same receipt. Examiner-replayable.tools-testsCI workflow that gates the promotion + surface-feed tests (previously ungated). Cross-linked from the governed-model-plane doc.Verified: 17 tools tests pass together (promotion + feeds).